Fix documentation link in README

README.md

@@ -3,7 +3,7 @@
 Provides a macro, `assert_matches`, which tests whether a value
 matches a given pattern, causing a panic if the match fails.
 
-[Documentation](https://murarth.github.io/assert_matches/assert_matches/index.html)
+[Documentation](https://docs.rs/assert_matches/)
 
 ```rust
 #[macro_use] extern crate assert_matches;